The solubility of Ca
  • 6y²
  • 36 y
  • 64 y
  • 108 y
A physician wishes to prepare a buffer solution at pH =85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?
  • 2, 5-Dihydroxy benzoic acid (pK
  • Acetoacetic acid (pK
  • m-Chlorobenzoic acid (pK
  • p-Chlorocinnamic acid (pK
Which of the following aqueous solutions will have highest pH?
  • NaCl
  • CH
  • Na
  • NH
What is the pH of a10 M solution of barium hydroxide, Ba (OH)
  • 11. 31
  • 11. 7
  • 13. 30
  • None of these
Which of the following oxides is not expected to react with sodium hydroxide?
  • CaO
  • SiO
  • BeO
  • B
The pH of a 10M NaOH solution is nearest to
  • 10
  • 7
  • 4
  • -10
It forms a salt NaX on reaction with alkali. The degree of hydrolysis of1 M solution of NaX is
  • 0. 0001%
  • 0. 01%
  • 0. 1%
  • 0. 15%
When equal volumes of1 M NaOH and01 M HCl are mixed, the hydroxide ion concentration is
  • 7. 0
  • 1. 04
  • 12. 65
  • 2. 0
Solubility product of Ag
  • 2. 66 × 10
  • 4. 5 × 10
  • 5. 3 × 10
  • 2. 42 × 10
In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will
  • Also be Doubled
  • Be Halved
  • Remain the Same
  • Become One-Fourth
When a neutral atom undergoes oxidation, the atoms oxidation state
  • Decreases as it gains electrons
  • Decreases as it loses electrons
  • Increases as it gains electrons
  • Increases as it loses electrons
0 h : 0 m : 1 s

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